Education levels linked to reduced Alzheimer's risk

A scientific study published in the journal PNAS suggests that increased years of schooling can measurably lower the long-term risk of Alzheimer's and related dementias. Researchers from the University of Southern California, the University of Wisconsin-Madison, and the University of Michigan analyzed data from over 100,000 participants via the UK Biobank.

The study utilized a 1972 British education reform, which raised the minimum school-leaving age from 15 to 16, as a natural experiment. The findings indicate that one additional year of education reduced the probability of developing dementia by approximately 0.88 percent.

Notably, the protective effect was most significant for individuals carrying the APOE-E4 genetic risk variant. In this group, the additional year of schooling nearly eliminated the statistical difference in dementia risk between those with high and low genetic susceptibility. Researchers emphasized that while genetics play a role, modifiable life circumstances like education can significantly influence neurological health outcomes.